MT#55283 fix shellcheck issues

Change-Id: I58b488dc2fa384fe1a67f16f6a015307c161c010

utils/build_test_wrapper

@@ -1,12 +1,13 @@
 #!/bin/sh
 TARGET=$1
 ROOT=$(echo "$TARGET" | sed 's/\.h$//')
-if test "x$MAKE" = x; then
+if test "$MAKE" = ""; then
+	# shellcheck disable=SC2209
 	MAKE=make
 fi
 echo "Looking for usable alternative for $TARGET"
 rm -f "$ROOT"-test "$ROOT"-test.c
-ln -s ../lib/"$ROOT"-test.c
+ln -s ../lib/"$ROOT"-test.c .
 for x in ../lib/"$ROOT"*.h; do
 	echo "Trying build with $x"
 	rm -f "$TARGET"